Differential mechanism



F. v. ELBERTZ..

DIFFERENTIAL MECHANISM.

ArrucArlon mxo Aus.z. Isls.

1,317,279. Pamdsepn 30, 1919.

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FRANK V'. EL'BEILTZ, 0F DETROIT, MICHIGAN.

DIFFERENTIAL MECHNISLI.

Specification of Lettori Patent. Puten fed Sept. 30, 1919.

Application filed August 2, 1916. Serial No. 112,697.

l To all 'who-m. it may concern infrA and an. arrangement thereof whereby the.

driven mechanism, as for example, the two sections of the follower Shaft, are rotated at a speed suitable to the rcquireu'ients of ser- 'vice but in suoli relation to the driving )arts as never to fall below the initial' spec imparted to them.

The invention also includes means whereby the usual planetary gears or beveled ty pe gears are supplanted by other puits of mole .simple and easily assembled and finished mechanism.

The invention consists in' the matters hereinafter set forth, and more particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a view in longitudinal section, partiallybrokcn awa and partially in elcvation, of adevicc ein Jodying features of the invention;

Fig. 2 is a. view in section taken on or about line lI--ll ot' Fig. l.;

Fig. 3 is a view in detail of au internal 1rear and teeth;

Fig. 4 is :i view in detail ot' a con'ibination of internal and external annular gears;

Fig. 5 is a vien' in detail of. a follower pinion;

Fig. li is a view in detail of an maaintric bushing inl which the annular gear is eccentrically mounted,

As herein shown in preferred foi-in, an outer casing l ol' appropriate design houses the inner end portion, if desired, of a drive shaft 2 provided with a drive beveled gear 3 that meshes with an annular beveled pinion 4. A gear casing 5 on which the annular pinion 4 is secured, is rotatably' mounted at the outer extremities thereof or in any convenient manner, in appropriate anti-friction bearings that maintain the axis ofthe casing in substantial concentric alineinent with extension arms 7 of the housing or the like. An inner annular rear 8 in the housing 5, that may be formed integri-ally" thereon or secured thereto as the case` may be,

is in mesh with a pair-of follower pinions i) euch of which has an elongated hub 10 that is journaled in air eccentric opening ll of a bushing 12, the latter being revoluble in the casing 5. Inner gear teeth llfornied concentrically with the outer gear teeth 14.

of the annular. pinion, 9, mesh with a coinpanion follower shaft pinion 16 the hub of which is non-rotatably secured to one of the sections 17 ofthe follower shaft..4 The latter sections are journaled in the casing 5.

Asa result of this construction the two sections 17 rotate under the driving eliort of the pinion gear 3 and annular beveled pinion 4 and casing 5in unison. If under any exigences of service, either one of them tends tol be retarted behind the other, it eannot, becauseof the construction, as lainly illustrated, rotate at less s eed than t mtimparted to it by the bevele pinion 4 and the rotation of the casing 5 and inner gear 8, and inconsequence the one which is traveling faster, tends to travel still faster because of this attempted retardation of the other section, and is forced to move the annular compound or internal-external gear around sutliciently to compensate for this. As a result of this motionof the annular gear, the unretarded portion of the shaft is speedcd up to move at higher than driving speed whileA the other portion maintains drivingsieed. 'In automobiles this eleminatesski dinpr to a large extent and greatly increases the ability of the machine to pull out of ruts and the like.

Obviously, changes in the details of construction may be made without departing from the spirit of my invention and l do not care to limit myself to any particular forni or arrangement of parts.

What I claim is 1. A differential gcarinrr com rising a drive shaft, a gear casing` rotata le transversely thereto, means for driving the casing from the shaft, a follower shaft the two sections of which are j'ouruulcd concentrically in the gear casing, an inner annulangcar iii the casing, pinions cach secured to the sec- ,tions of the follower shaft, bushings rotatably'inountcd concentiically with the pinions in thc gear casing, and compound pinlons mounted eci-.entricallv in the bushings in mesh iespectively with the inner annular gear and the shaft sectionv pinion.

2. Differential gearing eouun'ising an outer casing, a gear casing journaled therein.

a drive shaft transverse to thefaxis of the ing concentric witht e shaft pinions, bush ings ournaled in the casing concentric with the eftsections, inions journaled inthe bushings eccentriczly; with the shaft sec. tions, outer gear teeth on the pimons meshing with the inner annular gear of they casing and inner ear teeth on the pinons meshf ing with the s aft section plnions.

3. Differential 'gearing including s. rotatl abley gear casing,'means for driving the casi, mg, an internal annular gear secured in th slm 'of revolution of the coupling means to an casing, follower shaft sections journaled lhe casing concentric with the uxisthereof 420 inions secured on the end portions of 'the vollo'wer shaft sections concentric with the' internal annular gear, means for oporativel coupling the internal annular ar vand the.. t pmlons,v andmeans confining the orbit.v

shaft sections. l ,l I In testimonr whereof I aix my signature" 1n presence l'o axis eccentric to the of rotation of tliel two witnesses. AFRANK V. ELBERTZ, Witnesses:

ANNA M.Donn, Clins. W. Snurnorm. y. 

